UCC3818D SOP-16 PFC Pre-Regulator Controller IC
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Prices updated: 13 Oct 2026
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About this product
Active power factor correction (PFC) pre-regulator controller IC built on TI's BiCMOS process. It shapes the AC input current to follow the line voltage for near-unity power factor, and includes overvoltage protection, shunt UVLO and low start-up current for switch-mode power supplies.
Specifications
- Function
- Active PFC pre-regulator controller
- Package
- SOP-16 (SMD)
- Current amplifier offset
- ±2 mV
- Protection
- Overvoltage protection, shunt UVLO
- Modulation
- Leading-edge modulation
- Process
- BiCMOS
Frequently asked questions
What is this IC used for?
It controls an active PFC boost stage in AC-DC power supplies. It improves the power factor and reduces ripple current in the bulk capacitor.
Does it work on its own?
No. It needs an external power stage (boost inductor, switching MOSFET, diode and bulk capacitor) plus feedback and sensing networks designed according to the datasheet.
